Question

Show that the number 5×11×17+3×11 is a composite number.

In a teachers' workshop, the number of teachers teaching French, Hindi and English are 48, 80 and 144 respectively. Find the minimum number of rooms required if in each room the same number of teachers are seated and all of them are of the same subject.

Which of the following cannot be the unit digit of 8ⁿ, where n is a natural number ?

Prove that √5 is an irrational number.